lib/msvcrt/mbstring/mbsncoll.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/msvcrt/mbstring/mbsncoll.c
   5  * PURPOSE:
   6  * PROGRAMER:   Boudewijn Dekker
   7  * UPDATE HISTORY:
   8  *              12/04/99: Created
   9  */
  10 #include <msvcrt/mbstring.h>
  11
  12 int colldif(unsigned short c1, unsigned short c2);
  13
  14 /*
  15  * @implemented
  16  */
  17 int _mbsncoll(const unsigned char *str1, const unsigned char *str2, size_t n)
  18 {
  19         unsigned char *s1 = (unsigned char *)str1;
  20         unsigned char *s2 = (unsigned char *)str2;
  21
  22         unsigned short *short_s1, *short_s2;
  23
  24         int l1, l2;
  25
  26         if (n == 0)
  27                 return 0;
  28         do {
  29
  30                 if (*s1 == 0)
  31                         break;
  32
  33                 l1 = _ismbblead(*s1);
  34                 l2 = _ismbblead(*s2);
  35                 if ( !l1 &&  !l2  ) {
  36
  37                         if (*s1 != *s2)
  38                                 return colldif(*s1, *s2);
  39                         else {
  40                                 s1 += 1;
  41                                 s2 += 1;
  42                                 n--;
  43                         }
  44                 }
  45                 else if ( l1 && l2 ){
  46                         short_s1 = (unsigned short *)s1;
  47                         short_s2 = (unsigned short *)s2;
  48                         if ( *short_s1 != *short_s2 )
  49                                 return colldif(*short_s1, *short_s2);
  50                         else {
  51                                 s1 += 2;
  52                                 s2 += 2;
  53                                 n--;
  54
  55                         }
  56                 }
  57                 else
  58                         return colldif(*s1, *s2);
  59         } while (n > 0);
  60         return 0;
  61 }
  62
  63 /*
  64  * @implemented
  65  */
  66 int _mbsnbcoll(const unsigned char *str1, const unsigned char *str2, size_t n)
  67 {
  68         unsigned char *s1 = (unsigned char *)str1;
  69         unsigned char *s2 = (unsigned char *)str2;
  70
  71         unsigned short *short_s1, *short_s2;
  72
  73         int l1, l2;
  74
  75         if (n == 0)
  76                 return 0;
  77         do {
  78
  79                 if (*s1 == 0)
  80                         break;
  81
  82                 l1 = _ismbblead(*s1);
  83                 l2 = _ismbblead(*s2);
  84                 if ( !l1 &&  !l2  ) {
  85
  86                         if (*s1 != *s2)
  87                                 return colldif(*s1, *s2);
  88                         else {
  89                                 s1 += 1;
  90                                 s2 += 1;
  91                                 n--;
  92                         }
  93                 }
  94                 else if ( l1 && l2 ){
  95                         short_s1 = (unsigned short *)s1;
  96                         short_s2 = (unsigned short *)s2;
  97                         if ( *short_s1 != *short_s2 )
  98                                 return colldif(*short_s1, *short_s2);
  99                         else {
 100                                 s1 += 2;
 101                                 s2 += 2;
 102                                 n-=2;
 103
 104                         }
 105                 }
 106                 else
 107                         return colldif(*s1, *s2);
 108         } while (n > 0);
 109         return 0;
 110 }
 111
 112 int colldif(unsigned short c1, unsigned short c2)
 113 {
 114   return c1 - c2;
 115 }